ssh-tunnel command

ssh-tunnel

#!/usr/bin/env ruby

require "optparse"
require "ostruct"

$options = OpenStruct.new
$options.verbose = false
$options.local_port = nil

$opts = OptionParser.new do |o|
  o.banner = "Usage: ssh-tunnel [options] host port"

  o.separator ""
  o.separator "Open an SSH tunnel to the given host and port."
  o.separator ""

  o.on("-p", "--port [PORT]", Integer, "Bind to local port.") do |port|
    $options.local_port = port
  end

  #TODO reverse tunnel option (see ssh -R [bind_address:]port:host:hostport)

  #TODO --no-forward tunnel option

  #TODO
  # o.on("-v", "--[no-]verbose", "Run verbosely") do |v|
  #   $options.verbose = v
  # end

  o.on_tail("-h", "--help", "Show this message") do
    puts o
    exit
  end
end
$opts.parse!(ARGV)

if ARGV.length != 2
  puts $opts
  exit 1
end

$options.host = ARGV.shift
$options.port = ARGV.shift
$options.local_port ||= $options.port

cmd = sprintf "ssh -Nn -L %s:localhost:%s %s",
              $options.local_port, $options.port, $options.host

printf "Executing `%s`...\n", cmd

exec cmd